I just don't see the logic. If you have a small station that you're building, you'd only send one construction ship, but if you have a mega-complex that's hundreds of times the size of the average station, you'd only send ONE construction ship?
Why not assign multiple construction ships to a station plot and have each ship build a single module at a time?
I also think it's somewhat silly that construction ships cost a once-off fee to build a station and they don't care if they're stuck at the same plot for literal weeks of game time. I wanna meet the construction company that works like that IRL, I think I might have a few projects for them to consider.
